[Matplotlib-users] Labels alignmnet pie chart / matplotlib 2.1.0+

[IK]

Hi, 

I am having a question regarding a pie-chart labels alignment. I'd like to
have labels outside the pie-chart and centered to each wedge. According to
the documentation page, "labeldistance" parameter enables to place labels
outside the pie-chart, and "ha" & "va" parameters supposed to center.
However, these two options (ha & va) seems not working on Matplotlib
v2.1.0+. 1) With this example (pls see below), you can see that "car" label
is not centered properly, it is a bit off the center.

import matplotlib.pyplot as plt
figure = plt.figure()
axes = figure.add_subplot(111)
axes.set_aspect(1)  # circular pie
y = [1,2,3, 4,8,16,18]
label = ['car','domino', 'romancical','testing1', 'thisisthelonglabel', 
         'fffffffffffffffffffffffffffffffffffffffffff', 'as']
wedges, texts = plt.pie(y, 
                        radius=1.2, 
                        labels=label, 
                        labeldistance=1.0, 
                        rotatelabels =True,
                        startangle = 10,
                        wedgeprops = {"linewidth": 0.7, 
                                      "edgecolor": "white"},
                        textprops = dict(ha="center", 
                                          va="center")) # doesn't work 
plt.show()

<http://matplotlib.1069221.n5.nabble.com/file/t5207/pic1.png> 



I added the following lines to force labels to be centered, which works but
disabled a "labeldistance" parameter. So all my centered correctly, as I
want labels are overlapping with the pie-chart circle now.


wedges, texts = plt.pie(y, 
                            radius=1.2, 
                            labels=label, 
                            labeldistance=1.0, 
                            rotatelabels =True,
                            startangle = 10,
                            wedgeprops = {"linewidth": 0.7, 
                                          "edgecolor": "white"},
                            textprops = dict(va="center"))
for t in texts:
      #t.set_horizontalalignment("center")
       t.set_verticalalignment("center")
 plt.show() 


<http://matplotlib.1069221.n5.nabble.com/file/t5207/pic2.jpg> 


It seems that "va" option works perfectly for users of Matplotlib v 3.0.2,
but it doesnt on v 2.2.2
Could you please advice if there is a solution for keeping "labeldistance"
while using .set_horizontalalignment("center") ?

P>S: Pls. note the same question is posted on stackoverflow.com:
https://stackoverflow.com/questions/54441737/labels-alignmnet-pie-chart-matplotlib-2-1-0

Thanks



--
Sent from: http://matplotlib.1069221.n5.nabble.com/matplotlib-users-f3.html